#include <my_header.h>
/*Usage:  */
int main(int argc, char *argv[]){
    ARGS_CHECK(argc,2);
    int fd = open(argv[1],O_RDWR | O_CREAT | O_TRUNC, 0666);
    ERROR_CHECK(fd, -1,"open");
   
    char str[] = "hello world!";
    write(fd, str, sizeof(str));
    close(fd);
    return 0;
}


